NDLI: Efficient and stable beamforming architecture for high frequency ultrasound imaging systems

Content Provider	IEEE Xplore Digital Library
Author	Han Jin Cho Jeeun Kang Jae Jin Lee Jaehwang Choi Tai-kyong Song Jin Ho Chang
Copyright Year	2012
Description	Author affiliation: Osteosys Co., Ltd., Seoul, South Korea (Jaehwang Choi) \|\| Interdiscipl. Program of Integrated Biotechnol., Sogang Univ., Seoul, South Korea (Jin Ho Chang) \|\| Dept. of Electron. Eng., Sogang Univ., Seoul, South Korea (Han Jin Cho; Jeeun Kang; Jae Jin Lee; Tai-kyong Song)
Abstract	Medical high frequency ultrasound (HFUS) has played an important role in small animal imaging and its application has been extended to clinical use such as diagnosis of musculoskeletal diseases. This is mainly due to its high spatial resolution. To take full advantages of HFUS, full dynamic receive beamforming (DRBF) should be implemented. However, the high sampling rate and computational throughput required in HFUS imaging imposes a huge burden on implementation of the conventional full DRBF algorithm in which beamformation is conducted at all imaging points. This is because the full DRBF generally involves interpolation to increase sampling rate to 16 times the center frequency of transmit ultrasound $(f_{0}).$ For example, a 30-MHz ultrasound imaging system should conduct DRBF at the rate of 480 MHz. From this reason, HFUS systems have employed the zonebased DRBF (DRBF-ZB) in which imaging area is divided into several zones and each zone has representative focusing delay. However, this method inevitably suffers from degradation of lateral resolution. In this paper, we propose post-DRBF with polyphase interpolation filter (DRBF-PPF) that is capable of operating at the sampling frequency (i.e., generally 4 times higher than $f_{0}).$ In the proposed method, coarse delays of which resolution is equal to a sampling frequency are applied to RF channel samples at first. For fine interpolation, the coarse delayed samples with identical fractional delay, e.g., 0, 0.25, 0.5, 0.75, are gathered and fed to the corresponding polyphase filters. Final beamformed samples are obtained by summing the output samples of the filters. Note that the processing can be performed at the rate of the sampling frequency.
Starting Page	2254
Ending Page	2257
File Size	1104420
Page Count	4
File Format	PDF
ISBN	9781467345613
ISSN	19485719
e-ISBN	9781467345620
DOI	10.1109/ULTSYM.2012.0563
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-07
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Imaging Ultrasonic imaging Interpolation Spatial resolution Delays Array signal processing Transducers Musculoskeletal Diagnosis Receive Beamforming High Frequency Medical Ultrasound Imaging
Content Type	Text
Resource Type	Article

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